bitzenfeld



(No Model.) 2 Sheets-Sheet 1. E. 82 G. H. RITZENFELD.

EXHAUSTER. No. 393,857. Pat'ented Dec. 4, 1888.

(No Model.) 2 Sheets-Sheet 2.

E. 8v G. H. RITZENFELD.

. EXHAUSTER.

No. 393,857. Patented Dec. 4, 1888.

7 Fig.4.

N. PETERS. Pmso-Lilho n mr. Wilmin ton, 0.6.

UNITED STATES PATENT OFFICE.

EMIL RITZENFELD AND GUSTAV HERMANN RITZENFELD, OF BERLIN, GERMANY.

EXl-lAUSTER.

SPECIFICATION forming part of Letters Patent No. 393,857, dated December4, 1888.

Application filed October 15, 1885. Serial No. 179,985. (No model.)Patented in England September '7, 1885, No. 10,566.

To all whom, it may concern.-

Be it known that WGQEMIL RITZENFELD and GUSTAV HERMANN RITZENFELD, ofBerlin, in the Kingdom of Prussia and German Empire, have invented a newand useful Exhauster, of which the following is a specification,reference being had therein to the accompanying drawings, 110 patentsbeing obtained by us anywhere for this invention until now, save inGreat Britain, No. 10,566, dated September 7, 1885.

Our invention relates to improvements in aspirating apparatus for minesand the like, working in such a way as by heating the apparatus a vacuumwill be produced in the same, whereby the explosive gases will be suckedout of the mine, &c., and, passing through the apparatus, expelled atthe upper end of the exhauster into the atmosphere. \Ve attain theseobjects by introducing a partition-wall, G, as shown in the drawings,which separates the exhausted gases from the fire.

In the annexed drawings, Figure l is a front elevation; Fig. 2, avertical section, and Fig. 3 a horizontal cross-section through thecylinder; and Fig. 4 is also a horizontal crosssection through thecylinder and pipe K above the suction-pipe.

The cylinder A can be constri'icted in any desired height. In the lowerpart of it there is placed a pear-shaped furnace, B, for heating theair. The heating-space of the furnace B extends to the smoke-pipe orchimney D, utilizing directly the warmth produced whereon the effect ofthe new apparatus is principally based. To have an outlet for theexpanded air in the space surrounding the furnace B,the partition-wall Cis furnished with the stud E, through which the air can escape into thepipe F and communicate to the outer air by the top at G. The top of thechimney D is provided with a soot-box, H, to prevent priming.

J is a door for removing the soot, and K is a stud by which thesuction-pipe L enters the aspirating-cylinder A, thus acting directly onthe air to be exhausted.

e are aware that prior to our invention exhausters and aspiratingapparatus have been made with furnaces for heating the air, and therebysucking the noxious gases from mines and the like,

lVhat we claim, and desire to secure by Letters Patent of the UnitedStates, is

In an aspirating apparatus or exhauster for mines, the cylinder A,connected on its lower side with the suction-pipe L, in combination withthe pear-shaped furnace B, standing below the cylinder A and separatedfrom the cylinder A by a partition-wall, O, the smokepipe D, joined tofurnace B and provided with a soot-box, H, and the pipe F upon thepartition-wall, which pipe F passes through the cylinder A parallel tothe axis of the cylinder into the room below the cylinder, substantiallyas described.

In testimony that we claim the foregoing we have hereunto set our handsthis 8th day of July, 1885.

EMIL RITZENFELD. GUSTAV HERMANN RITZENFELD.

\Vitnesses:

JOSEPH PURATHEL, PAUL FISCHER.

